CO2 has not ramped up without notice, nor did ozone nor pfas. There are active efforts too handle each of them, and the only reason we aren't cracking down on most of those harder is that the utility they provide to human beings is far greater than the damages right now.
lots of things ramp up without our notice. Like CO2 in the atmosphere, or Ozone depleting chemicals, or PFAS in the water, microplastics in the ocean. I don't think it's a small list.